CoreDispatcherPriority CoreDispatcherPriority CoreDispatcherPriority Enum


Defines the priority for window event dispatches.

public enum CoreDispatcherPrioritypublic enum CoreDispatcherPriorityPublic Enum CoreDispatcherPriority
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)


High High High

High priority. Delegates are invoked immediately for all synchronous requests. Asynchronous requests are queued and processed before any other request type.


Do not use this priority level in your app. It is reserved for system events. Using this priority can lead to the starvation of other messages, including system events.

Idle Idle Idle

Lowest priority. Use this priority for background tasks. Delegates are processed when the window's main thread is idle and there is no input pending in the queue.

Low Low Low

Low priority. Delegates are processed if there are no higher priority events pending in the queue.

Normal Normal Normal

Normal priority. Delegates are processed in the order they are scheduled.